[Rcpp-devel] Rcpp Modules - Failed to initialize module pointer

[schattenpflanze at arcor.de]

OK, I think I got it. After restarting with a clean workspace, the 
message changed to
 > yada
Uninitialized module named "yada" from package "testmod",

which is probably due to some kind of lazy loading. I can then directly call
 > yada$foo(2,3)
[1] 6
 > yada
Rcpp module 'yada'
         6 functions:
             bar : 1 arguments
             bla : 0 arguments
            bla1 : 1 arguments
            bla2 : 2 arguments
             foo : 2 arguments
           hello : 0 arguments
         1 classes :
           World

My mistake was to use the line
 > yada <- Module( "yada" )
After this line, the command
 > yada$foo(2,3)
leads to the "Failed to initialize module pointer" error.

Is there a way to load/initialize the module in such a way that
 > library(testmod)
 > yada
immediately yields the full description above?


Best regards,
Peter



Am 09.04.2011 14:11, schrieb schattenpflanze at arcor.de:
> Hello,
>
> I would like to use the very nice Rcpp (0.9.3) Module feature to expose
> C++ functions to R. As a starting point, I tried to get the "testmod"
> package, created with
> Rcpp.package.skeleton( "testmod", module = TRUE )
> to run. I can compile and install the package without errors on R
> 2.14.0, Suse Linux 11.3. However, when I try to use the module, I get
> the following output:
>
>> require(Rcpp)
> Lade nötiges Paket: Rcpp
>> library(testmod)
> Attaching package: ‘testmod’
> The following object(s) are masked _by_ ‘.GlobalEnv’: yada
>> yada
> Uninitialized module named "yada" from package ".GlobalEnv"
>> yada <- Module( "yada" )
>> yada$foo( 1,2 )
> Fehler in Module(module, mustStart = TRUE) :
> Failed to initialize module pointer: Error in
> FUN("_rcpp_module_boot_yada"[[1L]], ...): no such symbol
> _rcpp_module_boot_yada in package .GlobalEnv
>
> I have seen the previous thread on a similar error, and I suppose the
> error is related to Section 3 of the Rcpp-modules vignette. The
> .onLoad() routine, however, is already present in the testmod package. I
> have also tried to replace the contents of zzz.R with the code given in
> Section 3.1.1 of the vignette (using populate()), with the same result.
> What do the error messages above actually mean and what am I missing here?
>
> Best regards,
> Peter
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